You simply cannot spend time in Mykonos without to visit Delos or Reneia island. Delos has a position as a holy sanctuary for a millennium before Olympian Greek mythology made it the birthplace of Apollo and Artemis. It also has an archeological site for daily visits and guided tours. In historical years the island was found in the shadow of neighboring Delos. When the Athenians imposed the purge on the island of Delos, during the first years of the Peloponnesian War and decided not to be born and not to die on the sacred island, Rhenia was transformed into a vast necropolis.